Luminous flux is the amount of light produced by a lighting device. In other words, luminous flux is the light power emitted by the light source in any direction. Luminous flux Lumen (lm) is measured in units.
As the lumen value of a lighting device increases, the brightness of the light in the environment, that is, the lux value, increases at the same rate. Producing different levels of luminous flux for different needs bar LED models this value for "lumen/metre" or "lm/mt" is expressed as ". The higher the maximum lumen value produced in 1 metre of the bar LED, the brighter and more intense light is produced.